2009 Audi A4 2.0T Quattro

When is the bigger engine choice not the better engine choice?

TONY QUIROGA

Nov 6, 2008

When Car and Driver staffers are faced with the question of which engine to buy, one might assume that we blindly gravitate toward the maximum number of cylinders or the maximum amount of horsepower. Opting for the “big engine” presumes that doing so will make the car quicker and potentially sound better, and perhaps even make the owner look like a superior human being. Aside from the extra upfront cost, ticking that option box often can make owning the car more expensive down the road, as fuel economy generally suffers and the means for the extra power often adds to the curb weight—a penalty we’re usually willing to live with to satisfy our addiction to speed.

A New A4

Audi comprehensively redesigned the A4 for 2009. The new A4 is sleeker and wider on the outside and larger on the inside. A 6.3-inch-longer wheelbase increases rear-seat legroom by nearly an inch, but the reality seems greater as the rear seat is now adult-worthy. We’ve previously tested an A4 3.2 Quattro, and although it was prohibitively expensive, we found it to be an excellent sports sedan worthy of consideration. That is, until Audi dropped off a new A4 powered by the exceptional 2.0-liter turbocharged four-cylinder engine. With an as-tested price of $35,005, the four-cylinder version was a staggering $16,720 less than the V-6 version we road-tested in September 2008.

Advantage: Four-Cylinder

Buyers interested in the 2009 Audi A4 will face a choice of two very different engines. Base versions of the A4 with Quattro all-wheel drive start at $33,525 and come equipped with a 2.0-liter turbocharged four-cylinder engine that makes 211 horsepower and 258 pound-feet of torque. Note: That’s more torque than the optional V-6 can muster. Previous A4s used a version of the same 2.0-liter engine. The major change to the engine for ’09 is the addition of variable valve timing, which adds 11 horsepower and an impressive 51 pound-feet of torque. Although it’s down 54 horsepower to the 3.2-liter V-6, the four-cylinder’s 0-to-60 time of 5.7 seconds was quick enough to match the acceleration of the V-6 version. Even when saddled with the heavy and friction-laden Quattro system and a six-speed automatic, the turbo four-cylinder provides better low-speed acceleration than a V-6 A4 with an automatic and all-wheel drive. The four-cylinder’s turbocharger provides immediate boost without a whiff of turbo lag and helps the base car outaccelerate the V-6 up to 50 mph. When speeds reach 80 mph, the V-6’s superior horsepower helps it to slowly pull away from the four-cylinder, but up to that speed, the two are identical. So the V-6 is certainly more expensive, but it’s not really any quicker than the base engine.

Fueling Our Suspicions

It was no surprise to find that the smaller 2.0-liter four-cylinder delivered better fuel economy than the 3.2-liter V-6. In our not-so-gentle hands, the V-6 returned an average of 19 mpg while the four-cylinder came in at 22 mpg; Audi recommends premium fuel for both engines. It was also no huge shock that the weight of the well-equipped A4 3.2 Quattro we tested came in at 3860 pounds, or 174 more pounds than the more basic 2.0T Quattro tester.